C20H18
74 compounds have this formula on CompoundList.
- Molar mass
- 258.36g/mol
- Monoisotopic mass
- 258.1409Da
- Atoms
- 38
- Elements
- 2
- Rings plus double bonds
- 12
The formula C20H18 describes a molecule made of 20 carbon atoms and 18 hydrogen atoms. It is written in Hill notation: carbon first, then hydrogen, then the other elements in alphabetical order. The formula tells you which atoms are present, not how they are connected, which is why several different chemicals can share it.
Elemental composition
- C Carbon × 2092.98%12.011 × 20 = 240.220 g/mol
- H Hydrogen × 187.02%1.008 × 18 = 18.144 g/mol
Compounds with the formula C20H18
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 74 of 74 compounds
![(1S,4S)-2,5-Diphenylbicyclo[2,2,2]octa-2,5-diene chemical structure, C20H18, CAS 850409-83-5](/s/BDYBOFJAEBJDMI-ROUUACIJSA-N.svg)
- 1,1':2',1''-Terphenyl, 3',6'-dimethyl-13102-23-3C20H18
- 1,2-Dimethyl-4,5-diphenylbenzene23063-12-9C20H18
- 1,1':4',1''-Terphenyl, 4,4''-dimethyl-97295-31-3C20H18
- (3aR,6aR)-3,6-Diphenyl-1,3a,4,6a-tetrahydropentalene947503-81-3C20H18
- 1,1'-Biphenyl,4-methyl-4'-(phenylmethyl)-216017-01-5C20H18
- 1,2,3,4-Tetrahydro-1,1'-binaphthalene199128-30-8C20H18
- Benz(e)aceanthrylene, 1,2,4,5,6,7-hexahydro-63041-92-9C20H18
- 2,2'-Binaphthalene, 1,2,3,4-tetrahydro-89238-97-1C20H18
- Benzene, 1,1'-(1,3-butadiyne-1,4-diyl)bis[4-ethyl-35672-48-1C20H18
- 1,1':2',1''-Terphenyl, 4,4''-dimethyl-64586-14-7C20H18
- 1-(Diphenylmethyl)-3-methylbenzene603-26-9C20H18
- (3aS,6aS)-3,6-Diphenyl-1,3a,4,6a-tetrahydropentalene940280-80-8C20H18
- 1,2,3,4-Tetramethylpyrene60826-75-7C20H18
- 1,5-(Ethano(1,4)benzeneoethano)naphthalene60058-13-1C20H18
- 1,8-DiphenyloctatetraeneC20H18
- 3,4-Dihydro-1,11-dimethylchrysene52171-93-4C20H18
- 11,12,17-Trimethyl-15H-cyclopenta(a)phenanthrene5831-11-8C20H18
- Benzene, 1,1'-(1,7-octadiyne-1,8-diyl)bis-13225-62-2C20H18
- 2~3~,2~5~-Dimethyl-1~1~,2~1~:2~2~,3~1~-terphenyl73935-73-6C20H18
- Benzene, [(4-phenyl-1-cyclohexen-1-yl)ethynyl]-87955-39-3C20H18
- 2~4~,2~6~-Dimethyl-1~1~,2~1~:2~3~,3~1~-terphenyl20260-26-8C20H18
- 1-Ethyl-2-(2-phenylphenyl)benzene65634-75-5C20H18
- 9-Phenyl-1,2,3,4-tetrahydroanthracene13225-66-6C20H18
- (5,14:8,11)-Diethanobenzocyclododecane, 6,7,12,13-tetrahydro-4432-72-8C20H18
- 17-Isopropyl-17H-cyclopenta(a)phenanthrene5830-63-7C20H18
- 7,12-Dimethyl-7,12-dihydrotetraphene35281-31-3C20H18
- 1,1'-(3-Methylhepta-4,5-dien-1-yne-3,6-diyl)dibenzene61423-07-2C20H18
- 1,1'-(3,4-Dimethylhexa-1,5-diyne-3,4-diyl)dibenzene61423-06-1C20H18
- 1,1',6,6'-Tetrahydro-6,6'-biazulene84509-63-7C20H18
- 1,3-Bis[1-(2,4-cyclopentadien-1-ylidene)ethyl]benzene147428-73-7C20H18
- 2'-Ethyl-1,1':4',1''-terphenyl2586127-41-3C20H18
- 5'-Ethyl-1,1':3',1''-terphenyl10346-14-2C20H18
- 9-[2-(Cyclopenta-2,4-dien-1-yl)ethyl]-9H-fluorene145998-19-2C20H18
- 1-(2-Methylpropyl)pyrene78751-47-0C20H18
- 9-But-1-ynyl-10-ethylphenanthrene624739-88-4C20H18
- 4-Butylpyrene104715-86-8C20H18
- Tricyclo[3.2.1.02,4]oct-6-ene, 2,4-diphenyl-28021-00-3C20H18
- 1,1'-(1,4-Diethylidene-2-butyne-1,4-diyl)bisbenzene52167-43-8C20H18
- 1,1',2,2'-Tetrahydro-2,2'-binaphthalene89238-96-0C20H18
- (1S,7R)-8,8-Diphenylbicyclo[5.1.0]octa-2,4-diene63798-09-4C20H18
- 1,2,3,4-Tetramethylfluoranthene71277-99-1C20H18
- 1-(2-Methyl-1-phenylprop-1-en-1-yl)naphthalene87829-13-8C20H18
- 1,1'-(Octa-1,3-dien-7-yne-1,5-diyl)dibenzene87639-18-7C20H18
- 2-Benzyl-5-methyl-1,1'-biphenyl917774-35-7C20H18
- 2,4-Diphenylbicyclo[3.2.1]octa-2,6-diene59252-60-7C20H18
- 1,4,6,9-Tetramethylbenzo[b]biphenylene104865-90-9C20H18
- 1,4-Dimethyl-2-(4-phenylphenyl)benzene3756-33-0C20H18
- (1R,3R)-1,3-Diphenyl-1,2,3,5-tetrahydropentalene2222463-83-2C20H18
- (1R,3R)-1,3-Diphenyl-1,2,3,4-tetrahydropentalene2222463-76-3C20H18
- 1,6-Diethylpyrene1195719-84-6C20H18
Frequently asked questions
What is the molar mass of C20H18?
The molar mass of C20H18 is 258.36 g/mol, calculated from standard atomic weights for 20 carbon atoms and 18 hydrogen atoms. The monoisotopic mass is 258.1409 Da.
How many compounds have the formula C20H18?
CompoundList lists 74 compounds with the molecular formula C20H18, including 1,1,1-Triphenylethane, 1,1,2-Triphenylethane, 4,4''-Dimethyl-(1,1',3',1'')terphenyl. Compounds that share a formula are isomers. They contain the same atoms arranged differently, so their properties, uses and prices can be very different.
What is the degree of unsaturation of C20H18?
C20H18 has a degree of unsaturation of 12. That is the total number of rings and pi bonds (a double bond counts as one, a triple bond as two) in any structure with this formula.